Cross pollination through biotic agents are entomophily, ornithophily and chiropterophily.
(1) Entomophily : Pollination effected through insects is called entomophily. Insect pollinated plants are called entomophilous. Entomophily is seen in plants like Hibiscus, Rose, Salvia, Oestrum, Jasmine, etc.
(2) Ornithophily : Pollination effected through the agency of birds is called ornithophily. Bird pollinated plants are called ornithophilous plants.
Ornithophily is seen in plants like Callistemon, Bombax, Butea, etc.
(3) Chiropterophily : Pollination effected through bats is called chiropterophily. Bat pollinated plants are called chiropterophilous plants. Chiropterophily is seen in plants like Anthocephalous (Kadamb tree), Adansonia (Baobab tree), Kigellia (Sausage tree).
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| No. | Syndrome | Cause | Characteristics of affected individual | Sex Male/Female/Both |
| 1 | Down’s | Trisomy of 21 |
‘a’ (i)
(ii)
|
'b' |
| 2 | ‘c’ | XXY | Overall masculine development | ‘d’ |
| 3 | Turner’s | 45 with OX |
‘e’ (i)
(ii)
|
‘f’ |